The Implementation of Payment Gateways in Magento 2

The Implementation of Payment Gateways in Magento 2

- in eCommerce, Magento
The Implementation of Payment Gateways in Magento 2

Magento 2 is an e-commerce open-source platform written in PHP utilized by more than 2,00,000 online retailers for selling their products online. In fact, it is noticed that in 4 online retailers, 1 has their platform build over Magento 2. Magento 2 is growing very rapidly and most of the retailers are planning to start their online business over this platform or planning to shift to this platform owing to its simple and easy use.

Today, we will have a look at how to integrate the payment gateways for Magento. Most of the online retailers complain that the payment is not done properly in their platform and the reason behind this is that the issues are rooted in the code. So, it is very important to seek out flexible integration so that your customers don’t have any issue while doing the payment.

Module Setup

A lot of changes have been done in Magento 2 and the Module Setup and code structure is not an exception over here. Inside the app/code folder, you have to create a namespace folder. Now, as we move ahead, one more thing has to be taken care of that the payment gateways come with their own set of PHP libraries for the integration part and they have to be included as well. This is managed by Composer. Take a close look at the composer.json file and you will see a require line.

By installing the sample extension through the composer, the payment gateway library will be placed under the vendor/payment-gateway-name folder and will be available through the autoloader in the code.

The XML configuration files also witness big changes too. XML scheme for each configuration type has been introduced by Magento 2 that needs to be followed or the working of the module will fail.  First, we will create the module.xml that will replace the configuration that was previously placed under the app/etc/modules/namespace_modulename.xml.

Implementation of Payment Gateways in Magento 2

Implementation of Payment

So far, the module file structure has been created, the module configuration files have been created and also the integration of our library files is done. Now, we will proceed with the payment integration.

You have to properly implement the admin settings since the system is going to handle most of the things automatically. The PayPal Magento extension has to be properly integrated if you are using PayPal as the payment gateway.

You have to handle the following three fields in the code: api_key, min_order_total and the max_order_total of the etc/adminhtml/system.xml file. The rest will be handled by Magento through the abstract classes by default. 

We will fetch the billing information through the payment object over here. The Credit card information is then passed into the payment gateway API which will handle the rest. If the transaction is successful, we can add the transaction to the list of transactions of Magento.

The payment method has another important feature like the ability to issue a refund from the Magento Admin. For this you have to implement the refund function.

So basically, we are fetching the transaction ID, that is then passed to API for handling the refund communication. The most important point that we need to keep in mind that the errors done during the transactions should be handled with proper care otherwise the customers will lack the confidence and trust for purchasing products from your store.

You have to handle the errors through the Exceptions from inside the catch block so that Magento gets notified of this error. In Magento 2, the checkout has been rewritten as the JS client side application for communicating through the API with the core system. PHP part itself is not enough for integration and so we have to add two more JS files through the layout update XML.

The purpose of these files is to provide UI configuration for the component used in checkout. After this, the module gets ready. The integration implementation is done with tokens so that the credit card information is not sent to the server. It is very important that you take care of the security of the private information of your customers.

If the private and sensitive information of your customers gets stolen or gets leaked to the hackers then they might try to damage the information or stole money from the account too. It is your responsibility to properly secure your database. Tokens are vital for this purpose.


So basically, the payment gateway integration for Magento gets completed here. There are a lot number of different payment gateways available that you can use for your online store. The payment gateways have different price, you can choose according to your requirement and use the API to integrate with your code. Make sure the development is clean to avoid any issues related to payment.

About the author

Harshal Shah has a countless experience as being a CEO of Elsner Technologies PVT. LTD: Professional Web Services that offers various  services to the clients across the globe with magento extensions. Mr. Harshal is an huge tech enthusiastic person who has written major & genuine

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